// Copyright (c) 2009 Christopher Keith (chris.keith@gmail.com)
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

#include <iostream>

class IntNode {
public:
  int     val;
  IntNode *next;
  IntNode(int i) { val = i; next = NULL; }
};

IntNode *reverseLL(IntNode  *oldHead) {
  IntNode *newNext = NULL;
  while (oldHead != NULL) {
    IntNode*  tmp = oldHead->next;
    oldHead->next = newNext;
    newNext = oldHead;
    oldHead = tmp;
  }
  return newNext;
}

void printLL(char* msg, IntNode  *head) {
    std::cout << msg << std::endl;
  while (head != NULL) {
    std::cout << head->val << std::endl;
    head = head->next;
  }
}

int main() {
  IntNode   *head = NULL;
  IntNode   *prev = NULL;
  for (int i = 0; i < 3; i++) {
    IntNode *n = new IntNode(i);
    if (prev != NULL) {
      prev->next = n;
    }
    prev = n;
    if (head == NULL) {
      head = n;
    }
  }
  printLL("Before reverse:", head);
  head = reverseLL(head);
  printLL("After reverse:", head);
  return 0;
}